My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.My info is limited on your model here but I see no one else has responded and thought I would see if I can help here.If the wear marks on #1 are different then the others this usually does indicate a possible broken ring causing this issue here.The piston and rings need inspected and replaced as needed.If the damage is severe the engine may need replaced.Thanks Pete